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WO2009068120A1 - Dispositif et procédé pour plier un coussin gonflable de sécurité - Google Patents

Dispositif et procédé pour plier un coussin gonflable de sécurité Download PDF

Info

Publication number
WO2009068120A1
WO2009068120A1 PCT/EP2008/006048 EP2008006048W WO2009068120A1 WO 2009068120 A1 WO2009068120 A1 WO 2009068120A1 EP 2008006048 W EP2008006048 W EP 2008006048W WO 2009068120 A1 WO2009068120 A1 WO 2009068120A1
Authority
WO
WIPO (PCT)
Prior art keywords
airbag
punch
diaphragm
aperture
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2008/006048
Other languages
German (de)
English (en)
Inventor
Stefan Imaide
Sven Ortmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of WO2009068120A1 publication Critical patent/WO2009068120A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/237—Inflatable members characterised by the way they are folded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/237—Inflatable members characterised by the way they are folded
    • B60R2021/2375—Folding devices

Definitions

  • the present invention relates to an apparatus and method for producing a predetermined fold pattern in the envelope of an inflatable air bag, i. for folding an airbag.
  • an air bag is compressed to a package size that allows the folded air bag to be mounted as part of an air bag module, such as a driver, passenger, or side airbag in a vehicle.
  • the airbag has to be folded in such a way that it can deploy in a desired manner quickly and without damage to the airbag cover during inflation in the event of an accident.
  • the invention has for its object to provide a method for generating a predetermined fold pattern in the shell of an inflatable airbag and a working device according to the method, which make it possible to fold an airbag as simple and fast as possible, so that this optimally and especially without Damage to the airbag cover can develop.
  • the airbag By creating a plurality of parallel folds by pulling the airbag through the panel in the shell thereof, the airbag can then be compressed in the longitudinal direction of the pleats and e.g. into the housing of an air bag module.
  • the sheath of the airbag By initially creating a predetermined fold pattern with parallel folds in the sheath of the airbag, it is possible to ensure that the sheath of the airbag does not chaotically deform during the subsequent compression or compression of the airbag in the longitudinal direction of the folds and unfolds.
  • the contour of the panel may, for example, have a multiplicity of rear and projections, which are arranged alternately with respect to one another. In this way, the generation of the predetermined fold pattern with folds running parallel to one another in the envelope of the airbag can be realized in the desired manner.
  • the airbag envelope is, as it were, combed through the rear and protrusions in the contour of the aperture, so that the envelope is wrinkled.
  • the back and projections may thus be similar to a comb about tines or spaced teeth, the edges of which are flattened and preferably rounded to avoid damage to the air bag envelope when the air bag is pulled through the panel.
  • the panel in a worktop, which is at least so large that the air bag to be folded on the worktop can be completely spread.
  • the airbag Before the airbag is pulled with the punch of the device through the aperture, the airbag can thus be placed or placed on the worktop in a fixed predetermined starting position in which he completely spans or covers the panel.
  • the reproducibility of the fold pattern to be produced in the airbag envelope as well as the deployment characteristic of the airbag can be improved.
  • the diaphragm can have a closed contour, as a result of which a predetermined fold pattern can be generated over the entire circumference of the airbag jacket.
  • the airbag to be folded is an airbag which should only be able to spread in a certain direction, as is the case with a side airbag, for example, it may be sufficient to use an aperture with an open contour that only in the area in which the airbag interacts with the panel, a predetermined fold pattern is generated in the airbag shell.
  • An aperture with an open contour may also prove advantageous in that the guide and the drive for the punch through the open area of the aperture to the outside, e.g. can be led to a kind Kulissenpun- tion, which allows a relatively simple construction of the device.
  • the punch has a tubular shape and also a counter-punch is provided, which is surrounded as a result of the advancing movement of the punch through the aperture of the latter.
  • the punch inverts during its advancing movement through the aperture on the located on the other side of the panel counter punch.
  • the airbag is pulled through the baffle, changing its direction at the free tube end of the punch, and coming to rest between the outside of the counter punch and the inside of the tubular punch.
  • a piston which is displaceable independently of the plunger by the diaphragm can be provided inside the plunger, to the free end of which the airbag to be folded can be removably attached.
  • this piston serves on the one hand for fastening the airbag and thus for generating a fixed predetermined starting position of the airbag.
  • said piston is used to compress the air bag, after it has been drawn into the annulus between the counter punch and the tubular punch, within the annulus. For this purpose, the piston is pushed through the aperture to reduce the annular space in the axial direction within the tubular punch, wherein at the same time the counter punch is pulled back or pushed back by means of the piston in order to allow the reduction of the annular space.
  • a cover plate which is arranged above the worktop and at a distance from it is.
  • the cover plate has above the aperture of the worktop on a recess to allow access of the punch and the piston displaceable therein to the aperture.
  • the cover plate needs to be arranged only a few millimeters above the worktop, which makes it necessary to arrange the airbag spread flat in the space between the cover plate and the worktop. The operator of the device according to the invention is thus effectively forced to neatly and smoothly spread the airbag in a fixed predetermined starting position, whereby the reproducibility of the generation of wrinkles is further improved.
  • the object underlying the invention is also achieved by the features of the independent claim relating to the method.
  • the object underlying the invention is also achieved by the features of the independent claim relating to the method.
  • an airbag is first spread on a worktop, which has a diaphragm which at least partially has such a contour that when pulling the airbag through the aperture in the airbag envelope of the airbag, a predetermined fold pattern is generated.
  • the airbag is then pulled through the panel in the method according to the invention, whereby in the desired manner in the shell, the predetermined fold pattern is produced with a plurality of parallel folds.
  • the stamp can in this case have a tubular shape in the manner described above, so that the airbag can be slipped over a counter punch during the advancing movement of the stamp through the panel.
  • Fig. 1 shows a sectional view through the device according to the invention in a starting position
  • Fig. 2 shows a sectional view through the device according to the invention in a working position
  • Fig. 3 shows a sectional view through the device according to the invention in a further working position
  • Figures 4a-4c show three air bags folded using different panels. First, with reference to Figs. 1 to 3, the construction of the device 10 according to the invention for generating a predetermined fold pattern in the envelope of an inflatable airbag 30 will be described.
  • the device 10 has a horizontal working plate 14, in which a diaphragm 12 is formed, which may have a closed or open contour, as can be seen from the plan view according to section B-B.
  • the panel 12 has a plurality of back and projections 36, 34 which are arranged alternately to each other and thus form a plurality of prongs or fingers.
  • the rear and projections 36, 34 in this case have a rounded shape, so that to some extent results in a serpentine-shaped, meandering or wavy diaphragm contour.
  • a cover plate 18 is arranged, which has a recess 38 above the aperture 12 of the worktop 14. Between the countertop 14 and the cover plate 18, a gap only a few millimeters high is formed, in which an air bag 30 to be folded using the device 10 according to the invention is to be spread over the entire surface, as shown in FIG.
  • the device 10 further comprises a tubular and preferably hollow cylindrical punch 16 which is positioned so that it can be pushed through the recess 38 of the cover plate 18 and the aperture 12 aligned with the aperture 12 from above.
  • the piston 22 is attached to a piston rod 40, by the actuation of the piston 22 can be moved within the punch 16.
  • the piston 22 has a plurality of attachment recesses (not shown) which serve to secure the airbag 30 thereto.
  • the airbag 30 has a gas generator 24 which has attachment pins 28 (see FIG. 4) projecting from the airbag 30, by means of which the airbag 30 can be secured in the aforementioned attachment recesses on the underside of the piston 22.
  • the device 10 further comprises a cylindrical counter punch 20, which is movable from a located below the countertop 14 pressure member 26 in the direction of the work surface 14 and through the aperture 12 thereof.
  • the counter punch 20 can be moved so far up until it comes with the air bag 30 and in particular with the gas generator 24 in abutment, so that the gas generator 24 on the one hand via the mounting pin 28 on the piston 22 and on the other hand by the counter punch 20 in his position is secured.
  • both the plunger 16 and the piston 22 are in their retracted position, in which the plunger 16 does not or only slightly into the intermediate space between the cover plate 18 and the work surface 14 - surfaced.
  • this initial position of the device 10 is started to spread an air bag 30 in the space between the cover plate 18 and the worktop 14 on the countertop 14.
  • the airbag 30 is thereby positioned on the work surface 14, that the gas generator 24 of the airbag 30 is in the region or above the aperture 12.
  • this is fastened to the underside of the piston 22 via the previously mentioned fastening pins 28 which project from the top side of the gas generator 24.
  • the counter punch 20 is moved by the pressure piece 26 and the aperture 12 so far up until it touches the underside of the airbag 30. Thereafter, the tubular punch 16 through the
  • a predetermined fold pattern with folds 32 extending parallel to one another is generated in the envelope of the airbag 30 in the desired manner, the shape, size and distance of which depends on the contour of the panel 12 (see Fig. 4).
  • the airbag cover is to a certain extent combed by means of the projections and recesses 34, 36 which define the contour of the panel 12, so that depending on the distance W (FIG. 4) the projections and recesses 34, 36, the pleats 32 have a smaller (see, for example, Fig. 4a) or a larger distance W (see, for example, Fig. 4c) to each other.
  • the airbag 30 When the punch 16 is advanced so far through the aperture 12 that it rests against the pressure piece 26, the airbag 30 has been completely pulled through the aperture 12 as a result of the forward thrust movement of the punch 16, so that the airbag 30 is completely in the Annulus 42 is located in which he hanging from the gas generator 24 slack down.
  • the counter punch 20 prevents oppositely contacting sections of the airbag 30 from touching one another, while the airbag 30 is drawn into the interior space formed by the punch 16 as a result of the advancing movement of the punch 16, as a result of which the airbag is compressed as described below 30 an undercut-free folding can be achieved.
  • the airbag 30 When the airbag 30 is in the slack down-hanging position shown in FIG. 3, the airbag 30 can be compressed in the longitudinal direction of the punch assembly 16, 20 by moving the piston 22 downward by operating the piston rod 40. At the same time the counter punch 20 is withdrawn by the pressure piece 26, so that during the reduction of the annular space 42 and the concomitant compression of the air bag 30 is prevented by the counter punch 20 that when compressing the air bag 30 interlocking portions of the airbag 30 together or hook or to lie on top of each other. Thus, a homogeneous folding of the airbag sleeve 30 is ensured.
  • the folded airbag 30 can be introduced into a ready-housing of an airbag module.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

La présente invention concerne un dispositif et un procédé pour plier un coussin gonflable de sécurité. Le dispositif selon l'invention présente un orifice et un poinçon pouvant être déplacé à travers cet orifice. Ledit orifice présente au moins localement un contour configuré de sorte qu'un profil de pliage prédéterminé présentant des plis parallèles puisse être obtenu dans l'enveloppe d'un coussin gonflable de sécurité tiré à travers l'orifice par le poinçon.
PCT/EP2008/006048 2007-11-27 2008-07-23 Dispositif et procédé pour plier un coussin gonflable de sécurité Ceased WO2009068120A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07023916.5 2007-11-27
EP07023916A EP2065265B1 (fr) 2007-11-27 2007-11-27 Dispositif et procédé destinés à plier une poche d'air

Publications (1)

Publication Number Publication Date
WO2009068120A1 true WO2009068120A1 (fr) 2009-06-04

Family

ID=39190327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/006048 Ceased WO2009068120A1 (fr) 2007-11-27 2008-07-23 Dispositif et procédé pour plier un coussin gonflable de sécurité

Country Status (4)

Country Link
EP (1) EP2065265B1 (fr)
AT (1) ATE457247T1 (fr)
DE (1) DE502007002833D1 (fr)
WO (1) WO2009068120A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076879A1 (fr) 2009-12-22 2011-06-30 Ucb Pharma Gmbh Polyvinylpyrrolidone destinée à la stabilisation d'une dispersion solide de la forme non cristalline de la rotigotine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972683A1 (fr) * 1998-07-14 2000-01-19 Delphi Technologies, Inc. Procédé et dispositif pour le pliage d'un sac de sécurité gonflable
WO2000015467A1 (fr) * 1998-09-14 2000-03-23 Breed Automotive Technology, Inc. Procede et dispositif permettant de plier un coussin gonflable
US20030171200A1 (en) * 2000-04-11 2003-09-11 Kazuyoshi Nishijima Method and device for folding up air bag, and air bag
US20050269807A1 (en) * 2004-06-04 2005-12-08 Trw Vehicle Safety Systems Inc. Air bag and a method of folding the air bag
DE102004028048A1 (de) * 2004-06-09 2005-12-29 Trw Automotive Safety Systems Gmbh Verfahren zum Zusammenlegen eines Gassacks, Vorrichtung zum Zusammenlegen eines Gassacks sowie zusammengelegter Gassack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972683A1 (fr) * 1998-07-14 2000-01-19 Delphi Technologies, Inc. Procédé et dispositif pour le pliage d'un sac de sécurité gonflable
WO2000015467A1 (fr) * 1998-09-14 2000-03-23 Breed Automotive Technology, Inc. Procede et dispositif permettant de plier un coussin gonflable
US20030171200A1 (en) * 2000-04-11 2003-09-11 Kazuyoshi Nishijima Method and device for folding up air bag, and air bag
US20050269807A1 (en) * 2004-06-04 2005-12-08 Trw Vehicle Safety Systems Inc. Air bag and a method of folding the air bag
DE102004028048A1 (de) * 2004-06-09 2005-12-29 Trw Automotive Safety Systems Gmbh Verfahren zum Zusammenlegen eines Gassacks, Vorrichtung zum Zusammenlegen eines Gassacks sowie zusammengelegter Gassack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076879A1 (fr) 2009-12-22 2011-06-30 Ucb Pharma Gmbh Polyvinylpyrrolidone destinée à la stabilisation d'une dispersion solide de la forme non cristalline de la rotigotine

Also Published As

Publication number Publication date
DE502007002833D1 (de) 2010-03-25
ATE457247T1 (de) 2010-02-15
EP2065265A1 (fr) 2009-06-03
EP2065265B1 (fr) 2010-02-10

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